CODEWITHSUNDEEP
objective-ciphoneipadavaudioplayer
leena
leena

Reputation: 699

Play music in the background using AVAudioplayer

I want to play music even if the app goes in background. I checked all stackoverflow links but none of them worked. Please help need to do it today.

I had used following code:-

NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"Day At The Beach"  ofType: @"mp3"];

NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: soundFilePath];

NSError *error;
playerTemp = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:&error];
playerTemp.numberOfLoops = 0;
AudioSessionSetActive(true);
[playerTemp play];

Upvotes: 41

Views: 41559

Answers (12)

viggio24
viggio24

Reputation: 12366

You can use MPMoviePlayerController even to play solo-audio movies. If you like it, read this detailed Apple Library Technical Q&A:

iOS Developer Library Technical Q&A QA1668

Upvotes: 3

Andy Weinstein
Andy Weinstein

Reputation: 2735

Also important here if you are using MPMusicPlayerController: You must use:

[MPMusicPlayerController iPodMusicPlayer]

And Not 

[MPMusicPlayerController applicationMusicPlayer]

Also if you don't want your app to stop music which was playing when your app is started, look here: AVAudioPlayer turns off iPod - how to work around?

Upvotes: 3

Zaky German
Zaky German

Reputation: 14334

If even after setting audio as one of your UIBackgroundModes in the plist the audio stops when going to background, try setting your application's audio session to media playback.

Here's the related reference: https://developer.apple.com/library/ios/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/Introduction/Introduction.html

Here's about what the code's gonna look like:

NSError *activationError = nil;
[[AVAudioSession sharedInstance] setActive: YES error: &activationError];

NSError*setCategoryError = nil;
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: &setCategoryError];

Upvotes: 2

sankalp
sankalp

Reputation: 757

Write this line in to plist for background run...

<key>UIBackgroundModes</key>
      <array>
              <string>audio</string>
      </array>

Write this code Where you want to use

AVAudioPlayer*  audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:self.urlForConevW error:&error];
audioPlayer.delegate = self;
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance] setActive: YES error: nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
audioPlayer.numberOfLoops =  1;       
[audioPlayer play];

Upvotes: 6

Juhi
Juhi

Reputation: 31

Step1

Make the following changes in info.plist

  1. Application does not run in background : NO

  2. Required background modes

    item0 :App plays audio or streams audio/video using AirPlay

Step 2 Don't forget to add the following things in MainViewController.h file

  1. #import <'AVFoundation/AVAudioPlayer.h>

  2. @interface MainViewController:<'AVAudioPlayerDelegate>

  3. AVAudioPlayer *H_audio_player;

Step 3 Add the following code inside the play action of your MainViewController class.

NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%d-%d",C_CID, C_SID] ofType:@"mp3"];
NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath];
H_audio_player = [[AVAudioPlayer alloc] initWithContentsOfURL:soundFileURL error:nil];
H_audio_player.delegate = self;
H_audio_player.numberOfLoops = -1;

Upvotes: 3

neowinston
neowinston

Reputation: 7764

From all answers is missing this code to control the player when user is waking the device:

- (BOOL)canBecomeFirstResponder {
        return YES;
    }

- (void)remoteControlReceivedWithEvent:(UIEvent *)event {
    switch (event.subtype) {

        case UIEventSubtypeRemoteControlPlay:

            [_audioPlayer play];
            break;

        case UIEventSubtypeRemoteControlPause:

            [_audioPlayer pause];
            break;

        default:
            break;
    }
}

And you have all these options:

UIEventSubtypeRemoteControlPlay                 = 100,
UIEventSubtypeRemoteControlPause                = 101,
UIEventSubtypeRemoteControlStop                 = 102,
UIEventSubtypeRemoteControlTogglePlayPause      = 103,
UIEventSubtypeRemoteControlNextTrack            = 104,
UIEventSubtypeRemoteControlPreviousTrack        = 105,
UIEventSubtypeRemoteControlBeginSeekingBackward = 106,
UIEventSubtypeRemoteControlEndSeekingBackward   = 107,
UIEventSubtypeRemoteControlBeginSeekingForward  = 108,
UIEventSubtypeRemoteControlEndSeekingForward    = 109,

Upvotes: 2

Gamma-Point
Gamma-Point

Reputation: 1514

From Apple's sample code: Audio Mixer (MixerHost)

// If using a nonmixable audio session category, as this app does, you must activate reception of 
//    remote-control events to allow reactivation of the audio session when running in the background.
//    Also, to receive remote-control events, the app must be eligible to become the first responder.
- (void) viewDidAppear: (BOOL) animated {

    [super viewDidAppear: animated];
    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    [self becomeFirstResponder];
}

I think remote control events are not needed for the following case:

AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryMixWithOthers,
                        sizeof(value), &value);

Upvotes: 0

Alastair Stuart
Alastair Stuart

Reputation: 4185

You need to set 'audio' as one of your UIBackgroundModes in Info.plist. Apple has documentation on the issue.

Upvotes: 6

Kanhaiya Sharma
Kanhaiya Sharma

Reputation: 1038

To play your audio in background

Step 1 :Just add in your info.plistmake an array enter image description here

step2 :

- (void)applicationDidEnterBackground:(UIApplication *)application
{
    __block UIBackgroundTaskIdentifier task = 0;
    task=[application beginBackgroundTaskWithExpirationHandler:^{
        NSLog(@"Expiration handler called %f",[application backgroundTimeRemaining]);
        [application endBackgroundTask:task];
        task=UIBackgroundTaskInvalid;
    }];
}

step3 :

NSString *soundFilePath = [[NSBundle mainBundle] pathForResource:@"iNamokar" ofType:@"mp3"];
    NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:soundFilePath];

    AVAudioPlayer *newPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:nil];

    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
    [[AVAudioSession sharedInstance] setActive: YES error: nil];
    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[player prepareToPlay];
[self.player play];

Upvotes: 1

user2168844
user2168844

Reputation: 73

I use the below code. It work for me, and call on the button click of audio player instance method.

NSError *error; NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"music" ofType:@"mp3"]]; 
self.player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:&error];
[[AVAudioSession sharedInstance] setActive:YES error: &error]; 
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self.player prepareToPlay];

Upvotes: 2

Mehul Mistri
Mehul Mistri

Reputation: 15147

I had solved this question by referring iOS Application Background tasks

and make some changes in .plist file of our application..

Update

write this code in your controller's view did load method like this

- (void)viewDidLoad
{
    NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"in-the-storm" ofType:@"mp3"]];
    AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
    [[AVAudioSession sharedInstance] setActive: YES error: nil];
    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    [audioPlayer play];
    [super viewDidLoad];
}

Upvotes: 84

ghostatron
ghostatron

Reputation: 2650

I just wanted to add a note to Mehul's answer. This line:

[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];

is actually very important. I used other tutorials to get my AVAudioPlayer up and running. Everything worked fine except my audio would not START if the app was in the background. To clarify, my audio was fine if it was already playing when the app went into the background...but it would not start if the app was already in the background.

Adding the above line of code made it so my audio would start even if the app was in the background.

Upvotes: 34

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